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(No Model.) F. S. DEWEY.

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Patented July 19, 1892.

Inventor mtmms UNITED STATES PATENT FFICF...

FRANKLIN S. DEIVEY, OF ALPENA, MICHIGAN.

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I SPECIFICATION forming part Of Letters Patent NO. 479,206, dated July 19, 1892.

Application filed May 2, 1892. Serial No- 4.3l,55l. (N0 model.)

To all whom, it may concern:

Be it known that I, FRANKLIN S. DEWEY, a citizen of the United States, residing at Alpena, in the State of Michigan, have invented certain new and useful Improvements in Indexes, of which the following is a specification, reference being had therein to the accompauying drawings.

This invention relates to new and useful improvements in books; and the invention consists in the peculiar construction of the edge of the book, having a marginal indented index, the two halves of the cover being of unequal Width, the lower one being cut away to the inner edge of the index and raised at its outer edge by a depending flange or strip, the upper cover overhanging the lower end and being provided with an index on its upper face, corresponding with the indented marginal index, and, further, in the peculiar construction and arrangement of the various parts, all as more fully hereinafter described.

In the drawings, Figure l is a perspective View ofabookembodyingmyinvention. Fig. 2 is an end elevation thereof. Fig. 3 is a perspective View looking from the opposite side from that shown in Fig. 1. Figs. 4, 5, and 6 show modified forms of construction of the elevating-strip at the edge of the book.

The book consists of the leaves A, having on their front edge any suitable construction of indented marginal index, such as B, the upper cover C, and lower cover D, the covers being connected in the usual manner by a back E. The upper cover extends beyond the edge of the leaves in the ordinary manner and is provided on its upper face, preferably on the overhanging portion, with an index F, corresponding to the index .B-that is, each letter of the index F is directly above the corresponding letter in the indented marginal index B. The lower cover is cut away to the inner edge of the index B, so that the finger of the operator is not obstructed at all in moving along the index by such lower cover. The outer edge of the lower cover is'provided with a downward-extending flange G. This flange may be formed in any suitable manner. I preferably construct it as shown in Figs. 4 and 5, formed of a piece of sheet metal bent to form the binding portion a and the flange G, forming a metallic binding for the edge, as

well as the downward-extending flange. This may be secured to the edge of the book by means of rivets b or in any other suitable manner.

In Fig. 5 I have shown a single strip of metal at the edge, with a downward-extendin g flange formed by bending the edge of the metal at right angles to the securing portion.

In Fig. 6 I have shown aconstruction similar to Fig. 4, only that the flange is formed back a little distance from the edge. The book when thus constructed when lying in the position shown in Fig. 1 it is evident that the outer edge will be raised above the desk on which it rests a distance equal to the height of the flange G, which will give ample room for the finger of the operator to be inserted beneath the thickest portion of the indexthat is, at Z.

The book is so constructed that the operator can slide his finger along to the proper letter, which he can ascertain by examining the index F, without turning over the book, and then raising the top cover with the necessary leaves he can open the book to the desired point, using one hand only.

The book whichI have shown is especially designed for a right-handed person-that is, so that the index can be operated entirely with the left hand, leaving the right hand free to work with. This may be reversed for lefthanded persons.

If the book happens to be turned the other side up, the index B will be in plain View, as the cover is cut away, so that the operator can thus see the index upon either side without lifting the cover or moving the book.

What I claim as my invention is 1. In a book, an indented marginal index, the covers, one projecting to or beyond the outer edge of the leaves of the book and the other out off at the inner edge of theindentations', a flange at or near the margin of the narrow cover, and an index on the outer face of the wide cover, corresponding to the indented index, substantially as described.

2. In a book, an indented marginal index, to the indented index, substantially as dethe covers, one projecting to or beyond the scribed. I outer edge of the leaves and the other out Intestimony whereoflatfix rny signature in off at the inner edge of the indentations, a presence of two Witnesses.

5 metal binding for the narrow cover, a flange FRANKLIN S. DEWEY.

or bend formed in said binding to raise the \Vitnesses: outer edge of the book, and an index on the J AS. WHITTEMORE,

outer face of the wide cover, corresponding M. B. ODOGHERTY. 

